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c0 c1 c2 c3 c4
d0 d1 d2 d3 d4
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A is reflected in mirror line DE to give A'. A' is reflected in FG to give A''. Similarly A is reflected in FG to give B, and B is reflected in DE to give C.
Is it true that both A'' and C are rotations of A about the centre indicated?

Result:
What is the connection between their angles of rotation?
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